OFPST_PORT_DESC reply (xid=0x2):
 1(ovn-7a81ec-0): addr:82:cd:ef:72:ee:ad
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:02:06:7f:e3:1e:dc
     config:     PORT_DOWN
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
